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#version 430 core
layout(binding = 0) uniform Globals {
uniform vec3 iResolution;
uniform float iTime;
uniform float iTimeDelta;
uniform float iFrameRate;
uniform int iFrame;
uniform float iChannelTime[4];
uniform vec3 iChannelResolution[4];
uniform vec4 iMouse;
uniform vec4 iDate;
uniform float iSampleRate;
};
layout(binding = 0) uniform sampler2D iChannel0;
layout(binding = 1) uniform sampler2D iChannel1;
layout(binding = 2) uniform sampler2D iChannel2;
layout(binding = 3) uniform sampler2D iChannel3;
layout(location = 0) in vec4 gl_FragCoord;
layout(location = 0) out vec4 _fragColor;
#define texture2D texture
void mainImage( out vec4 fragColor, in vec2 fragCoord );
void main() { mainImage (_fragColor, gl_FragCoord.xy); }
#define t iTime
void mainImage( out vec4 fragColor, in vec2 fragCoord )
{
// Normalized pixel coordinates (from 0 to 1)
vec2 uv = ( fragCoord - .5*iResolution.xy) / iResolution.y;
vec3 col = vec3(0.);
float a = atan(uv.y,uv.x);
float r = 0.5*length(uv);
float counter = 100.;
a = 4.*a+20.*r+50.*cos(r)*cos(.1*t)+abs(a*r);
float f = 0.02*abs(cos(a))/(r*r);
vec2 v = vec2(0.);
for(float i=0.;i<counter;i++){
v = mat2(v,-v.y,v.x) * v + vec2(2.*f+cos(0.5*t*(exp(-0.2* r))),-cos(t*r*r)*cos(0.5*t));
if(length(v)>2.){
counter = i;
break;
}
}
col=vec3(min(0.9,1.2*exp(-pow(f,0.45)*counter)));
fragColor = min(0.9,1.2*exp(-pow(f,0.45)*counter) )
* ( 0.7 + 0.3* cos(10.*r - 2.*t -vec4(.7,1.4,2.1,0) ) );
}
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